Customer stated Frozen Drink Machine unit still keeps coming out of calibration. Unable to reach multiplex to discuss issue. Will call Monday to figure out problem. Recalibrated, made a few drinks and working ok. Did notice the two blender containers have an 8oz difference in weight. Unsure if this may be a problem. Someone will be in touch Monday. 11/27/2018 Went through checklist given by tech at multiplex of areas that will effect calibration. Removed scale pad, scale plate, scale ring, scale beam. Made sure no obstructions and all fitting properly. Unable to get empty scale weight down to below 11.8 no matter how many times calibrated. Tech says issue May be touch screen. Made multiple drinks and all seem okay. Found 2 different blender containers have a substantial weight difference and this may be why keeps coming out of calibration. Told customer to only use lighter container and see if it helps. If issue persists may need to replace touch screen. Unit okay at this time